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HomeMy WebLinkAbout08/07/1990, C-9 - WASTEWATER MANAGEMENT PLAN IMPLEMENTATION, APPROVAL OF PLANS AND SPECIFICATIONS FOR UNIT 3 WASTEWAT I. MEETING DATE: ,� ►�H�Ioillllilllli� lllllli city of San lues OBISPO Aucrust 7 1990 COUNCIL AGENDA REPORT ITEM NUMBER . FROM: William T. Hetland U.:15� Prepared By: John E. Mos Utilities Director Wastewater Division Manage SUBJECT: Wastewater Management Plan Implementation, Approval of Plans and Specifications for Unit 3 Wastewater Treatment Improvements and Phase 1 Collection System Improvements. CAO RECOMMENDATION: By motion, 1) approve plans and specifications for Unit 3 Wastewater Treatment Plant Improvements and Phase 1 Collection System Improvements and authorize solicitation of bids. DISCUSSION: Background: On October 28, 1986, the City retained Brown and Caldwell Engineers to prepare the Wastewater Management Plan (WWMP) . The purpose of the plan was to identify needed improvements to the. City's wastewater treatment and collection facilities to meet all discharge requirements and treat expected future flows to the year 2015. Implementation of the WWMP to date has included activities i related to planning, research, design and funding. The City has been working closely with the State Division of Loans and Grants (SDLG) in order to obtain low interest loan funding for the needed projects. On May 17, 1990 the State Water Resources Control Board approved loan funding of the City's projects in the amount of $35 million. Plans and specifications for Unit 3 Wastewater Treatment Plant Improvements and Phase 1 Collection System Improvements projects were completed in May 1990 and submitted to the State Division of Loans and Grants for review and approval. The SDLG has subsequently completed their review of the plans and specifications and staff is now ready to advertise these two projects for bids. Unit 3 Wastewater Treatment Plant Improvements project consists of those modifications and additions to the City's treatment facility necessary to meet the effluent requirements identified in the City's National Pollutant Discharge Elimination System (NPDES) permit. This includes processes for influent screening, aerated grit removal, ammonia removal and BOD and suspended solids removal. mn�►�iii�lllllll��° q�I�ll city of San lU1S OBISpo COUNCIL AGENDA REPORT Plans and Specs Approval Page 2 Phase 1 Collection System Improvements consist of approximately 3.2 miles of parallel relief and replacement sewers. These sewers are being installed to relieve the problem of surcharging of the collection system and subsequent spills resulting from high Infiltration/Inflow (I/I) during storm events. The new sewers will convey the high flows to the City's wastewater treatment plant for proper treatment and disposal. Consequences of Not Taking the Recommended Action: Staff has negotiated with the State Regional Water Quality Control Board (SRWQCB) , the final terms of a Consent. Decree. The Consent Decree is a court documented agreement between the City and the State for achieving compliance with the discharge requirements in the City's NPDES .permit. The Consent Decree includes a schedule of key activities or milestones necessary -to achieve full compliance. Under the Consent Decree the. City is required approve plans and specifications for Unit 3 by August _ 28, 1990 and to advertise these projects no later than October 10, 1990. Failure to meet the dates specified in the compliance _ schedule of the Consent Decree will result in fines from the State. It is essential to proceed with each step in the process. in a timely manner in order to stay ahead of the compliance dates as much as possible. Conclusion: In order to obtain full compliance with the discharge requirements in the City's NPDES permit and to meet the compliance schedule in the Consent Decree the City must proceed with each step of the improvements projects in a timely manner. Authorizing staff to advertise for bids is the next step in process of achieving full compliance and is therefore recommended at this time. FISCAL IMPACT: The City is seeking and has obtained concept approval for State low interest loan funding of the needed improvements. Based on the cost projections and a 4 percent interest rate loan from the State, Council, on June 12, 1990, adopted Resolution No. 6824 approving rate increases of $2 .00 per month each year for the next 3 years for a single family residence and a financing plan/revenue program sufficient to cover the debt service expense of the projects. Funding for these projects has been approved and is identified in the 1989-91 Financial Plan and Approved 1989-90 Budget, Page E-17. r-a f �����ib�i►�illlllilA11i llil city of san tuts osispo NUMMO COUNCIL AGENDA REPORT Plans and Specs Approval Page 3 In the review of the plans and specifications the State has identified certain elements of the construction which are not eligible for loan funding. Those items found ineligible relate primarily to reserve capacity. The State will fund up to 12 years capacity from the date of project initiation. An example of this is; The State will not fund the difference in cost of a 54 inch versus a 48 inch influent line as the 54 in line is designed for year 2015 flows and only a 48 inch line is needed to handle the flows in the next 12 years. This difference in cost is minor in comparison to the cost of reconstruction of the line at a later date to accommodate the 2015 flows. Those items found ineligible for loan funding and their estimated cost are as follows: Components found ineligible for funding: UNIT 3 IMPROVEMENTS Additional costs of providing a 54 inch diameter influent sewer in lieu of a 48 inch diameter sewer. . . . . . . . . . . . . . . . . . . . . . . . .$17, 000 Additional costs of providing 2 influent pumps at 22 mgd capacity in lieu of 2 pumps at 12 mgd. . . . . . . . . . . . . . . . . . . . . . . . . . . . .$80,000 Additional costs of providing new pavement around the existing digesters. . . . . . . . . . . . . . .$12,000 Additional costs of providing landscaping around the existing structures. . . . . . . . . . . . . .S10.000 TOTAL INELIGIBLE $1191000 PHASE 1 COLLECTION SYSTEM IMPROVEMENTS- Bid Item No. 25 - Comply with Corps and Fish and Game Permits. . . . . . . . . . . . . . . . . . . . . . .$10,000 Bid Item No. 26 - Comply with Caltrans Encroachment Permit. . . . . . . . . . . . . . .. . . . . . . . . .$15,000 Additive Alternate No.1 - Televise Existing Service Laterals. . . . . . . . . . . . . . . ... . ..899.840 TOTAL INELIGIBLE $124,840 The total engineer's estimate for each project are identified below. The number in parentheses is the total estimated amount found ineligible for loan funding which will have to be funded through working capital balances or other debt financing. �►�� ► IllllillP��"°IAl city of San tins OBISpo COUNCIL AGENDA REPORT Plans and Specs Approval Page 4 Total Engineer's Estimate: Total Cost (Total Ineligible) UNIT 3 IMPROVEMENTS- $15,245,005 ($119,000) ** PHASE 1 COLLECTION SYSTEM IMPROVEMENTS - $ 7,152,577 ($124,840) * Includes 3% contingency ** Includes 20i contingency RECOMMENDATION: By motion, approve plans and specifications for Unit 3 Wastewater Treatment Plant Improvements and Phase 1 Collection System Improvements and authorize solicitation of bids. Attachments: Plans and Specifications are available in the COUNCIL Office for review.